arch/m68knommu/platform/68360/config.c

   1 /*
   2  *  linux/arch/m68knommu/platform/68360/config.c
   3  *
   4  *  Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
   5  *  Copyright (C) 1993 Hamish Macdonald
   6  *  Copyright (C) 1999 D. Jeff Dionne <jeff@uclinux.org>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file COPYING in the main directory of this archive
  10  * for more details.
  11  */
  12
  13 #include <stdarg.h>
  14 #include <linux/config.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/mm.h>
  18 #include <linux/tty.h>
  19 #include <linux/console.h>
  20
  21 #include <asm/setup.h>
  22 #include <asm/system.h>
  23 #include <asm/pgtable.h>
  24 #include <asm/irq.h>
  25 #include <asm/machdep.h>
  26 #include <asm/m68360.h>
  27
  28 #ifdef CONFIG_UCQUICC
  29 #include <asm/bootstd.h>
  30 #endif
  31
  32 extern void m360_cpm_reset(void);
  33
  34 // Mask to select if the PLL prescaler is enabled.
  35 #define MCU_PREEN   ((unsigned short)(0x0001 << 13))
  36
  37 #if defined(CONFIG_UCQUICC)
  38 #define OSCILLATOR  (unsigned long int)33000000
  39 #endif
  40
  41 unsigned long int system_clock;
  42
  43 void M68360_init_IRQ(void);
  44
  45 extern QUICC *pquicc;
  46
  47 /* TODO  DON"T Hard Code this */
  48 /* calculate properly using the right PLL and prescaller */
  49 // unsigned int system_clock = 33000000l;
  50 extern unsigned long int system_clock; //In kernel setup.c
  51
  52 extern void config_M68360_irq(void);
  53
  54 void BSP_sched_init(void (*timer_routine)(int, void *, struct pt_regs *))
  55 {
  56   unsigned char prescaler;
  57   unsigned short tgcr_save;
  58   int return_value;
  59
  60 #if 0
  61   /* Restart mode, Enable int, 32KHz, Enable timer */
  62   TCTL = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN;
  63   /* Set prescaler (Divide 32KHz by 32)*/
  64   TPRER = 31;
  65   /* Set compare register  32Khz / 32 / 10 = 100 */
  66   TCMP = 10;
  67
  68   request_irq(IRQ_MACHSPEC | 1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  69 #endif
  70
  71   /* General purpose quicc timers: MC68360UM p7-20 */
  72
  73   /* Set up timer 1 (in [1..4]) to do 100Hz */
  74   tgcr_save = pquicc->timer_tgcr & 0xfff0;
  75   pquicc->timer_tgcr  = tgcr_save; /* stop and reset timer 1 */
  76   /* pquicc->timer_tgcr |= 0x4444; */ /* halt timers when FREEZE (ie bdm freeze) */
  77
  78   prescaler = 8;
  79   pquicc->timer_tmr1 = 0x001a | /* or=1, frr=1, iclk=01b */
  80                            (unsigned short)((prescaler - 1) << 8);
  81
  82   pquicc->timer_tcn1 = 0x0000; /* initial count */
  83   /* calculate interval for 100Hz based on the _system_clock: */
  84   pquicc->timer_trr1 = (system_clock/ prescaler) / HZ; /* reference count */
  85
  86   pquicc->timer_ter1 = 0x0003; /* clear timer events */
  87
  88   /* enable timer 1 interrupt in CIMR */
  89 //  request_irq(IRQ_MACHSPEC | CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  90   //return_value = request_irq( CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  91   return_value = request_irq(CPMVEC_TIMER1 , timer_routine, IRQ_FLG_LOCK,
  92           "Timer", NULL);
  93
  94   /* Start timer 1: */
  95   tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001;
  96   pquicc->timer_tgcr  = tgcr_save;
  97 }
  98
  99
 100 void BSP_tick(void)
 101 {
 102   /* Reset Timer1 */
 103   /* TSTAT &= 0; */
 104
 105   pquicc->timer_ter1 = 0x0002; /* clear timer event */
 106 }
 107
 108 unsigned long BSP_gettimeoffset (void)
 109 {
 110   return 0;
 111 }
 112
 113 void BSP_gettod (int *yearp, int *monp, int *dayp,
 114                    int *hourp, int *minp, int *secp)
 115 {
 116 }
 117
 118 int BSP_hwclk(int op, struct hwclk_time *t)
 119 {
 120   if (!op) {
 121     /* read */
 122   } else {
 123     /* write */
 124   }
 125   return 0;
 126 }
 127
 128 int BSP_set_clock_mmss (unsigned long nowtime)
 129 {
 130 #if 0
 131   short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
 132
 133   tod->second1 = real_seconds / 10;
 134   tod->second2 = real_seconds % 10;
 135   tod->minute1 = real_minutes / 10;
 136   tod->minute2 = real_minutes % 10;
 137 #endif
 138   return 0;
 139 }
 140
 141 void BSP_reset (void)
 142 {
 143   local_irq_disable();
 144   asm volatile ("
 145     moveal #_start, %a0;
 146     moveb #0, 0xFFFFF300;
 147     moveal 0(%a0), %sp;
 148     moveal 4(%a0), %a0;
 149     jmp (%a0);
 150     ");
 151 }
 152
 153 unsigned char *scc1_hwaddr;
 154 static int errno;
 155
 156 #if defined (CONFIG_UCQUICC)
 157 _bsc0(char *, getserialnum)
 158 _bsc1(unsigned char *, gethwaddr, int, a)
 159 _bsc1(char *, getbenv, char *, a)
 160 #endif
 161
 162
 163 void config_BSP(char *command, int len)
 164 {
 165   unsigned char *p;
 166
 167   m360_cpm_reset();
 168
 169   /* Calculate the real system clock value. */
 170   {
 171      unsigned int local_pllcr = (unsigned int)(pquicc->sim_pllcr);
 172      if( local_pllcr & MCU_PREEN ) // If the prescaler is dividing by 128
 173      {
 174          int mf = (int)(pquicc->sim_pllcr & 0x0fff);
 175          system_clock = (OSCILLATOR / 128) * (mf + 1);
 176      }
 177      else
 178      {
 179          int mf = (int)(pquicc->sim_pllcr & 0x0fff);
 180          system_clock = (OSCILLATOR) * (mf + 1);
 181      }
 182   }
 183
 184   printk(KERN_INFO "\n68360 QUICC support (C) 2000 Lineo Inc.\n");
 185
 186 #if defined(CONFIG_UCQUICC) && 0
 187   printk(KERN_INFO "uCquicc serial string [%s]\n",getserialnum());
 188   p = scc1_hwaddr = gethwaddr(0);
 189   printk(KERN_INFO "uCquicc hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
 190          p[0], p[1], p[2], p[3], p[4], p[5]);
 191
 192   p = getbenv("APPEND");
 193   if (p)
 194     strcpy(p,command);
 195   else
 196     command[0] = 0;
 197 #else
 198   scc1_hwaddr = "\00\01\02\03\04\05";
 199 #endif
 200
 201   mach_sched_init      = BSP_sched_init;
 202   mach_tick            = BSP_tick;
 203   mach_gettimeoffset   = BSP_gettimeoffset;
 204   mach_gettod          = BSP_gettod;
 205   mach_hwclk           = NULL;
 206   mach_set_clock_mmss  = NULL;
 207   mach_reset           = BSP_reset;
 208 }